Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
Browse man made glass (often grouped with minerals in lapidary) specimens identified by the Rock Identifier community.
Slag Glass
Amorphous Silica Glass (with metal oxide inclusions)
Mineraloid / Industrial Waste
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Septarian Nodule (Septarian Stone)
Septarian Concretion (CaCO3 with Siderite/Calcite/Aragonite)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2)
Sedimentary Rock
Jasper
Jasper (SiO2 plus impurities)
sedimentary
Chalcedony Geode
Chalcedony (SiO2) within a geode structure
Mineral Geode/Sedimentary or Volcanic related
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Quartzite with inclusions
Quartzite
metamorphic
Quartz with Mica inclusion
Silicon Dioxide (SiO2) with Muscovite/Biotite inclusions
igneous
Unakite
Epidotized Granite
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper (likely Brown or Brecciated)
Jasper (Silicon Dioxide, SiO2)
sedimentary
Carnelian
Carnelian (SiO2 with iron oxide impurities)
mineral
Quartz (likely a macrocrystalline variety like milky quartz or smoky quartz, given the appearance in the image)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)
mineral
Fluorite, Sodalite, and Rose Quartz collection
Calcium Fluoride (CaF2), Sodium Aluminum Silicate with Chlorine (Na8(Al6Si6O24)Cl2), Silicon Dioxide (SiO2)
mineral
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Milky Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Quartzite (specifically Pink or Red Quartzite)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Ocean Jasper
Orbicular Jasper (Silicon Dioxide with impurities like Hematite and Chlorite, SiO2)
sedimentary
Green Aventurine
Aventurine (variety of Quartz - SiO2)
Mineral_Rock
Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Banded Agate (Botswana Agate)
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
mineral
Red Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartz River Pebble
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine Quartz or Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalcedony
Chalcedony (SiO2)
mineral
Chalcedony on Matrix (Botryoidal Agate)
Silicon Dioxide (SiO2)
mineral
Quartz / Chert
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral